RU2078046C1 - Filter for drinking water treatment - Google Patents

Abstract

FIELD: water treatment. SUBSTANCE: filter is made of body, feeding and outlet nozzles that were disposed in body by successive way: layer of fibrous polymeric material, layer of anionite and cationite mixture, layer of fibrous amphoteric polymeric material, layer of bactericidal iodine-containing material, layer of fibrous amphoteric material, layer of strong-basic anionite, and layer of activated fibrous carbon and anionite mixture. EFFECT: enhanced effectiveness of filter. 1 dwg

Description

 The invention relates to devices for water purification, in particular to devices for purifying drinking water, which can be used both in household conditions for purifying drinking water from a city water supply system, and in a number of other cases, for example, when taking water from a storage tank.

 The proposed device can be used in various sectors of the economy, for example, in the food and pharmaceutical industries, in medicine, for example, when sterilizing medical utensils, tools, etc., as well as in extreme conditions, for example, on ships, in traveling conditions, in emergency situations.

 Tap water, especially drinking from domestic water supply, often comes to the consumer of unsatisfactory quality. In some cases, water has a high hardness, an unpleasant taste, the smell of chlorine and organic impurities. Cases of increased content of organic impurities in water (phenol, oil products, etc.) are known. A particular problem is the increased content of iron in water, especially oxide.

 A device for water purification is known (French patents NN 2616773, 2617155, C 02 F 9/00, 1988), which contains a multilayer filter media including filter material with pores up to 20 μm for the first filtration, activated carbon and material with pores up to 6 μm to retain colloidal particles, a layer of a mixture of ion-exchange resins (anion-exchange and cation-exchange) to delay anions (sulfates and nitrates, in particular), metal cations, and also partially for organic impurities, then a membrane layer to hold pathogenic microbes and viruses. However, such a device is not sufficiently effective in treating water with a high iron content.

 Closest to the invention is a filter for drinking water (US patent N 4913808, CL 210-93, published. 03.04.90), which contains a housing with inlet and outlet pipes and arranged in series in the housing of the ion-exchange layer of a mixture of cation exchange resin and anion exchange resin, bactericidal layer and the last layer in the direction of purified water containing activated carbon.

 The main disadvantage of such a filter is that it does not cope well with water treatment with a high content of iron, in particular oxide, in the form of highly dispersed suspensions, which causes low water values for color.

 The proposed device is intended for the purification of drinking water with a high content of iron, in particular oxide, in the form of highly dispersed suspensions, which causes low water values for color.

 The drawing shows a filter, a longitudinal section.

 The filter contains a cylindrical housing 1 with a lower cover 2 and a nozzle 3 for introducing purified water and an upper cover 4 and a nozzle 5 for the outlet of purified water, distribution plates 6. Inside the housing 1 along the movement of the purified water the following layers of sorption charge are placed: 7 - polymer fiber microparticle removal material; 8 layer of a mixture of anion exchange resin and cation exchange resin to remove colloidal particles and particles of highly dispersed suspensions of iron, in particular oxide; 9 layer of fibrous amphoteric polymer material; 10 layer bactericidal iodine-containing material; 11 - a layer of fibrous amphoteric polymer material; 12 layer of strongly basic anion exchange resin; 13 layer of a mixture of activated fibrous carbon and anion exchange resin (cation exchange resin).

 As the anion exchange resin, granular anion exchange resin grades AB-17-8, AB-15, IB-19, AB-29, EDE-10 can be used.

 As cation exchange resin can be used cation exchange resin grades KU-2-8, KB-4, KB-4P2, KU-23, cattle of various types.

 As fiber activated carbon can be used coal brands "Aktilen", "Dnepr", coal UVM.

 As granulated coal can be used coal grades AG-5, AG-3, AG-5C, AG-8C.

 Activated carbon or anion exchange resin saturated with iodine can be used as a bactericidal layer.

 As a neutral layer, a fibrous polymeric material, such as fibrous propylene or fibrous amphoteric polymeric material, is used. Fibrous activated carbon may be used. The amphoteric material in the proposed device can be placed either as the first layer of the pre-treatment layer, or between the layers, while it serves to further remove cations.

 The filter works as follows.

 Using an adapter, the filter is connected to a water tap and water is turned on. The purified water through the pipe 3 enters the filter housing, is distributed by means of plates 6 along the fibrous polymer material 7, is freed from particulate matter, enters the layer 8, where colloidal particles and particles of highly dispersed suspensions of iron, in particular oxide, are removed. Then the purified water passes through layers 9, 10, 11, 12 and 13.

 Water is subjected to a bactericidal treatment on a layer of iodine-containing bactericidal material, as a result of which all bacteria and microorganisms contained in it are killed, while the transition metal cations passing through a layer of an ion-exchange mixture under the influence of oxidizing agents resulting from chemical reactions are converted into anion exchangers. Then, on a layer of strongly basic anion exchange resin, water is purified from various kinds of anions, chloride ions, metal nitrate ions in the form of anions. After such a treatment, water enters a layer of a mixture of fibrous activated carbon and anion exchange resin or cation exchange resin or granular carbon, where it is purified from organic impurities, in particular phenol and organochlorine substances.

 Such placement of the layers of the multilayer sorption charge allows for deep, highly effective water treatment, while ensuring a sufficiently high effect.

Claims (1)

 A filter for drinking water purification, comprising a housing, supply and outlet pipes and an ion exchange layer of a mixture of cation exchange resin and anion exchange resin arranged sequentially in the housing, a bactericidal layer and the last layer containing activated carbon in the direction of purified water, characterized in that it is provided with up to and after the ion-exchange and after the bactericidal layer with layers of neutral fibrous and / or ion-exchange amphoteric material, an additional ion-exchange layer of strongly basic anion exchange resin located behind it and the last layer in the direction of the purified water is made in the form of a mixture of fibrous or granular activated carbon and anion exchange resin or cation exchange resin.